Particles having charge-controlling group on outer surface for electronic-paper display device and method for preparing the same
AssigneeLG Electronics Inc.
InventorsMoon-Bong Song, Soon-Hyung Kwon, Sung-Guk Lee
Life of this patent
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Abstract
Particles for an electronic paper display device and a method for preparing the same. Since charged particles have a constant electrification amount, a moving speed and a moving amount of the charged particles are uniformly controlled at the time of an electrophoresis. Also, a response speed and a resolution of an electronic paper display device are improved, and an amount of a voltage applied to the electronic paper display device is precisely controlled.
Claims13
A method for preparing charged particles for an electronic paper display device, comprising:
- forming a particle by mixing a colorant and a resin, wherein the resin is formed before mixing or is formed during mixing by polymerization;
- applying a charge controlling material comprising a functional group such that the charge-controlling material is distributed at an outer periphery of the particle, wherein the charge controlling material is applied by coating the functional group on the particle or by coupling the functional group to the resin during the polymerization;
- and
- applying an additional material to the charge controlling material.
Charged particles for an electronic paper display device, comprising:
- a particle comprising a colorant and a resin;
- a charge controlling functional group layer distributed at an outer surface of the particle;
- and
- an additional material on the functional group layer.
Dependencies are inferred from the claim text.